Effect of phosphate on heterogeneous Fenton oxidation of catechol by nano-Fe3O4: Inhibitor or stabilizer?
文献类型：期刊论文
| 作者 | Yang, Xiaofang; He, Jie; Sun, Zhongxi; Holmgren, Allan; Wang, Dongsheng |
| 刊名 | JOURNAL OF ENVIRONMENTAL SCIENCES
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| 出版日期 | 2016-01 |
| 卷号 | 39期号:0页码:69-76 |
| 关键词 | Heterogeneous Fenton oxidation Adsorption ATR-FTIR Interface mechanism |
| 英文摘要 | The effect of phosphate on adsorption and oxidation of catechol, 1,2-dihydroxybenzene, in a heterogeneous Fenton system was investigated. In situ attenuated total reflectance infrared spectroscopy (ATR-FTIR) was used to monitor the surface speciation at the nano-Fe3O4 catalyst surface. The presence of phosphate decreased the removal rate of catechol and the abatement of dissolved organic compounds, as well as the decomposition of H2O2. This effect of phosphate was mainly due to its strong reaction with surface sites on the iron oxide catalyst. At neutral and acid pH, phosphate could displace the adsorbed catechol from the surface of catalyst and also could compete for surface sites with H2O2. In situ IR spectra indicated the formation of iron phosphate precipitation at the catalyst surface. The iron phosphate surface species may affect the amount of iron atoms taking part in the catalytic decomposition of H2O2 and formation of hydroxyl radicals, and inhibit the catalytic ability of Fe3O4 catalyst. Therefore, phosphate ions worked as stabilizer and inhibitor in a heterogeneous Fenton reaction at the same time, in effect leading to an increase in oxidation efficiency in this study. However, before use of phosphate as pH buffer or H2O2 stabilizer in a heterogeneous Fenton system, the possible inhibitory effect of phosphate on the actual removal of organic pollutants should be fully considered. (C) 2015 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V. |
| 收录类别 | SCI |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/36034]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Yang, Xiaofang,He, Jie,Sun, Zhongxi,et al. Effect of phosphate on heterogeneous Fenton oxidation of catechol by nano-Fe3O4: Inhibitor or stabilizer?[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2016,39(0):69-76. |
| APA | Yang, Xiaofang,He, Jie,Sun, Zhongxi,Holmgren, Allan,&Wang, Dongsheng.(2016).Effect of phosphate on heterogeneous Fenton oxidation of catechol by nano-Fe3O4: Inhibitor or stabilizer?.JOURNAL OF ENVIRONMENTAL SCIENCES,39(0),69-76. |
| MLA | Yang, Xiaofang,et al."Effect of phosphate on heterogeneous Fenton oxidation of catechol by nano-Fe3O4: Inhibitor or stabilizer?".JOURNAL OF ENVIRONMENTAL SCIENCES 39.0(2016):69-76. |
入库方式： OAI收割
来源：生态环境研究中心
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